Do people in north and South Korea practice Buddhism?
I'm not sure about North Korea, but Buddhism is a major religion in South Korea. South Korea is also very Christian.
Wikipedia has a good article on this (see sources below): Religion in Korea encompasses a number of different traditions. Korea's religious tradition is influenced by traditional Buddhism, Mugyo with a background of Korean Confucianism, and fast growth of Christianity. The modern separation of Korea into North and South Korea has also shaped religious practice, especially in the communist North.
The two main religions in South Korea is Buddhism and Christian - Presbyterian. There are some catholics, but if you go out into the streets of Korea. You will see a church basically every few blocks or so. Buddhism still lives among Koreans because of their culture. Most Christians in Korea still follows few Buddhist traditions such as the Buddhist funerals for their parents. STILL, you can say that the main "Religion" in South Korea…